package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 分类分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        //使用pagehelper准备分页
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        //查询
        Page<Category> page = categoryMapper.queryByPage(categoryPageQueryDTO);
        long pageTotal = page.getTotal();
        List<Category> categoryList = page.getResult();
        return new PageResult(pageTotal,categoryList);
    }

    /**
     * 新增分类
     * @param categoryDTO
     */
    @Override
    public void add(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.DISABLE);
        categoryMapper.insert(category);
    }

    /**
     * 删除分类
     * @param id
     */
    @Override
    public void delete(Long id) {
        //如果该分类下面关联了菜品或者套餐，不允许删除
        int count = dishMapper.selectByCategoryId(id);
        if (count > 0) {
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        count = setmealMapper.selectByCategoryId(id);
        if (count > 0) {
            throw new  DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
       categoryMapper.deleteById(id);
    }

    /**
     * 启用禁用分类
     * @param id
     * @param status
     */
    @Override
    public void updateStatus(Long id, Integer status) {
        Category category = Category.builder().id(id)
                .status(status)
                .build();
        categoryMapper.update(category);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    @Override
    public List<Category> getByType(Integer type) {
        List<Category> categorys = categoryMapper.selectByType(type);
        return categorys;
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }
}

